Audio Authority 1715 Headphone Demonstration Amplifier
Introduction
The 1715 is designed to provide high fidelity amplification for headphones in self service retail demonstrations. Only one of the four outputs may be active at any one time. Larger switching systems, linked by Expansion Bus and audio patch cords, can allow one live position on each 1715 or one live position in the entire system (see Expansion Bus). When a demo session times out, the headphones are silent. The next demo starts at the default volume, regardless of the volume level of the previous demo. For best results use a commercial grade lossless audio player such as our Model 1703.
*Theft detection no longer supported as of 2021
Package Contents: 1715 headphone demonstrator, DC power adapter
Features
- Up to 500 mW (into 32 ohms), frequency response 12Hz – 23kHz (+/- 0.5 dB), S/N ratio 96dB, THD+N (1VRMS @ 1 kHz) = 0.07%
- Adjustable demonstration timeout, returns to silent mode, resets volume
- Automatic selection of customer audio source when connect
- Multiple units (up to four) can share source signal and volume controls
Audio Sources and Customer Auto Demo
Connect a 1703 music player to the Audio Input jack as the default source. If desired, provide a 3.5mm cord connected to the Customer Input so that customers may use their own music players to demonstrate headphones. When audio is detected on the Customer Input jack, the customer device is automatically selected as the audio source. If no audio is detected on the Customer Input for 3 seconds, the 1715 switches back to the Default Input.
Audio Bus Out
The bus output feeds the currently selected audio input to more 1715 modules or other audio devices in the system. Connect a 3.5mm patch cord from the first 1715 bus output to the second 1715 default Audio Input, etc. One linked system sharing a Default Input also must share one Customer Input (do not use any Customer inputs besides the first 1715).
Customers can activate one product at a time using a four-wire LED push-button switch (sold separately). Connect a button for each corresponding product. The LED in the button blinks during the demonstration.
Expansion Bus
Buttons are available in several styles and colors.Expansion Bus is a four-conductor cable that allows multiple 1715 and colors. modules to form one coordinated system. They can coordinate current product selection and volume control. The expanded system may allow one output per 1715 module to play (Module Mode), or one output for the entire system (System Mode). Turn on Feature Switch 1 of each 1715 to activate System Mode.
Control Port
To control volume on all outputs, connect a 1895 Visual Volume TM Control knob (sold separately). This control option gives visual feedback with its glow ring, its brightness indicating volume changes; a slow pulse highlights the knob during attract mode. Push to mute, and rotate knob to adjust volume. Turn on Feature Switch 2 of the primary 1715 when using one 1895 to control multiple 1715 amplifiers.
1895 Visual Volume Control knob.
Timeout Interval
The demo timer is initiated each time a customer selects a product output to audition. The demonstration length is set by the timeout switch, in 15 second increments. If the switch is set to 0, then the automatic demonstration timeout feature is disabled. After the timeout expires, all outputs are de-selected and the volume is reset.
Power
Connect included 12V power supply to Power Input. Connect jumper to other 1715 units if desired, up to four units total.
How to Set the Gain Control
- Raise the volume controls (on the player and/or 1715) to maximum.
- Connect a pair of headphones to the 1715 that has similar impedance and sensitivity to the range of headphones you wish to demonstrate.
GAIN DIAL - Turn the 1715 Gain dial (see chart below) to 1 and start the music player.
- Select a headphone position, and raise the 1715 Gain dial to the point of distortion, then adjust it down to the desired maximum level.
| Gain | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 |
| *(mW) | 0.9 | 1.5 | 3.2 | 5 | 13 | 30 | 70 | 185 | 475 | 500 |
*Power rating taken at 1% THD+N, 1kHz input, using 32 ohm load.
Operation
On power up, the status light blinks to show normal operation. Press a product select button to demo headphones. The default volume level is a percentage of the maximum, relative to the Gain setting. When the Customer Input is being used, the Status light blinks rapidly. If used, the 1895 volume control light ring pulses in attract mode and indicates volume levels during a demo.
2048 Mercer Road, Lexington, KY 40511-1071 USA 800-322-8346 · 859-233-4599 · Fax: 859-233-4510 [email protected] www.audioauthority.com
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References
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